<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
<div>
    <input type="text" v-model="num1">
    <input type="text" v-model="num2">
    <input type="button" value="加" @click="f('+')">
    <input type="button" value="减" @click="f('-')">
    <input type="button" value="乘" @click="f('*')">
    <input type="button" value="除" @click="f('/')">
    <h1>结果：{{info}}</h1>
</div>
<script src="js/vue.min.js"></script>
<script>
    let v = new Vue({
        el:"body>div",
        data:{
            info:"",num1:"",num2:""
        },
        methods:{
            f(x){
                v.info = eval(v.num1+x+v.num2);
            }

        }
    })
</script>
</body>
</html>